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arXiv · 2009.05068

Super-resolution imaging with an achromatic multi-level diffractive microlens array

Sourangsu Banerji·Monjurul Meem·Apratim Majumder·Berardi Sensale-Rodriguez·Rajesh Menon
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Abstract

Compound eyes found in insects provide intriguing sources of biological inspiration for miniaturized imaging systems. Inspired by such insect eye structures, we demonstrate an ultrathin arrayed camera enabled by a flat multilevel diffractive microlens array for super-resolution visible imaging. We experimentally demonstrated that the microlens array can achieve large fill factor (hexagonal close packing with pitch=120um), thickness of 2.6um, and diffraction-limited (strehl ratio = 0.88) achromatic performance in the visible band (450nm to 650nm). We also demonstrate super-resolution imaging with resolution improvement of 1.4 times by computationally merging 1600 images in the array.

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Sourangsu Banerji, Monjurul Meem, Apratim Majumder, Berardi Sensale-Rodriguez, Rajesh Menon. 2020-09-10. Super-resolution imaging with an achromatic multi-level diffractive microlens array. https://doi.org/10.1364/ol.410013

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